Brother HL-3170CDW - Manual (Page 123)

Routine Maintenance
117
4
i
Repeat step c and step h to clean each of three remaining corona wires.
NOTE
When you clean the corona wires, you do not have to remove the toner cartridge from the drum unit.
j
Slide the toner cartridge and drum unit assembly into the machine. Make sure that you match the toner
cartridge color to the same color label on the machine.
BK
C
M
Y